package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
    //新增菜品以及对应口味
    @Override
    @Transactional()//保证整个方法是个原子性的，因为这里要操作两张表
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //想菜品表插入一条数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键
        Long dishId=dish.getId();

        //想口味表插入多个数据，也可以没有
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors!=null&&flavors.size()>0){
            //此时才可以插入多条数据，因为口味不是必选项
            flavors.forEach(flavor->{flavor.setDishId(dishId);});
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(), dto.getPageSize());

        Page<DishVO> page = dishMapper.pageQuery(dto);

        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    @Transactional()//多表操作，保证事务注解，保证事务一致性
    public void deleteBatch(List<Long> ids) {
        //先判断当前菜品能否删除，不起售才能删除
        ids.forEach(id->{
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                //当前菜品在出售，不允许删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });
        //先判断当前菜品是否能够删除，是否北套餐关联，关联也不能删除
        List<Long> setmeals = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmeals!=null&&setmeals.size()>0){
            //当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
//        for(Long id:ids){
//            dishMapper.deleteById(id);
//            //删除菜品表关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //根据菜品id集合批量删除菜品数据
        //古菜品id集合批量删除口味数据
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    @Transactional()
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //菜品表，一个update语句
        dishMapper.update(dish);
        //口味则有些许麻烦，可能新增也可能后面追加，也可能删除
        //所以我们先删除所有口味再覆盖
        dishFlavorMapper.deleteByDishId(dish.getId());

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
           flavors.forEach(flavor->{flavor.setDishId(dishDTO.getId());});
           dishFlavorMapper.insertBatch(flavors);
        }



    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.update(dish);
    }
}
